Chlorite geothermometry can be a tricky area given mixed-layering and just general mixtures of chlorite with other fine grained minerals. This could lead to problems like what you are experiencing because the calculated formulas will not be that of chlorite, but rather a mixture. There is a paper by Essene and Peacor (1995) that talks about clay mineral thermometry and some of their downfalls, which may be worth looking at to see if it can help you figure out whats going on.
Could you please explain/detail what you wrote about "results seem to contradict one another" ??? is there a problem with temperature-depth data ? (this question is aimed to get some additional data on a problem i am working on...)
Some principles must be observed, for instance, (1) consistency between
the chemical data of your chlorites and those of chlorites used in the calibration of the geothermometers, (2) correlation between the Fe/(Fe + Mg) ratio and AlIV contents, and (3) the results should be compared with independent temperature estimations
You may find a short discussion and several references on this subject in the attached paper
Hello sorry to get into this talk. I´m just starting reading about Chlorite thermometry, and I have a (stupid) question: how can I calculate AlIV from the microprobe analysis? Please help me !!